Currently, no I do not have one. On a previous boat a friend who is a ham operator put one in temporarily for our delivery from Seattle to LA. He had fun, I suppose, talking to people during the trip. Maybe if we were to have had trouble it would have been of value. We didn’t have any trouble so it was just a toy. I would rely more on VHF and an EPIRB in an emergency due to the spotty working of the HF equipment. Maybe it was because it was a temp install, not sure.
It is true that traffic on the Marine HF has reduced considerably with both the advent of Sat Com and the wholesale decommissioning of the High Seas HF radio telephone services. What you are left with in the "non-ham" space are still the USCG monitored channels, the USCG weather voice broadcast channels, quite a bit still of WeFax, SailMail, and the occasional shrimp dragger out of NOLA.
In the ham space of maritime HF, you still have a 24/7 monitor on 14.3MHz for maritime safety, various Nets including the cruisers net, the waterway net, the carribean net (I think), and likely some others of interest. And, email services too.
But, overall, HF is leaning more into the hobby space and less into the operational space.
For me, as a ham, I'll continue to have and use HF.
For non-hams, my advice is to use HF IF you don't have SatCom, you go out beyond VHF range (lets say >75 miles from shore), and you want some dialog with someone before you trip the EPIRB. I've heard some very interesting discussions with the USCG and boat operators involving abandoning ship (or not). You can't do that with SPOT or EPIRBS.